Transport Layer Security (TLS)

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wikipedia:Transport Layer Security



macOS 10.15 (June 2019) and IOS 13 requirements (https://support.apple.com/en-us/HT210176)

  • TLS server certificates and issuing CAs using RSA keys must use key sizes greater than or equal to 2048 bits
  • SHA-2


SSL and TLS protocols
Protocol Published Status
SSL 1.0 Unpublished Unpublished
SSL 2.0 1995 Deprecated in 2011 (RFC 6176)
SSL 3.0 1996 Deprecated in 2015 (RFC 7568)
TLS 1.0 1999 Deprecation planned in 2020
TLS 1.1 2006 Deprecation planned in 2020
TLS 1.2 2008
TLS 1.3 2018


Related terms

  • SMTPS ((TCP port number 465 using TLS))

See also

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